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  • 1
    Monograph available for loan
    Monograph available for loan
    Scaling and uncertainty analysis in ecology : methods and applications (2006)
    Dordrecht : Springer
    Details Availability
    Call number: M 09.0459
    Description / Table of Contents: Contents: 1. Concepts of scale and scaling. 2. Perspectives, methods of scaling. 3. Uncertainty analysis in ecological studies. 4. Multilevel statistical models, ecological scaling. 5. Downscaling abundance from species distribution. 6. Scaling terrestrial biogeochemical processes. 7. A framework, methods for simplifying landscapes. 8. Building up with top-down approach. 9. Carbon fluxes across regions. 10. Landscape and regional scale studies of nitrogen gas fluxes. 11. Multiscale relationships of landscape characteristics and nitrogen concentrations in streams. 12. Uncertainty in scaling nutrient export coefficients. 13. Causes, consequences of land use change in North Carolina Piedmont. 14. Assessing spatial scale influence on relationship between avian nesting success and forest fragmentation. 15. Scaling issues in mapping riparian zones. 16. Scale issues in lake-watershed interaction. 17. Scaling, uncertainty in region-wide water quality decision-making. 18. Scaling with known uncertainty.
    Type of Medium: Monograph available for loan
    Pages: xviii, 351 S. , graph. Darst., Kt.
    ISBN: 1402046642 , 978-1-402-04664-3
    Classification:
    Ecology
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Regulation of the Caulobacter flagellar gene hierarchy; not just for motility (1997)
    Oxford BSL : Blackwell Science Ltd
    Molecular microbiology 24 (1997), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The Caulobacter crescentus flagellum serves not only as a motility apparatus, but also as a key landmark in the differentiation of this asymmetrically dividing bacterium. A distinctive aspect of flagellum biosynthesis is the periodic expression of the flagellar genes during the cell cycle in a sequence corresponding to the order of gene product assembly into the growing flagellum. This program of gene expression is achieved in part by the organization of flagellar genes into a four-tiered regulatory hierarchy that controls their expression at both the transcriptional and post-transcriptional levels. Because of the close interconnection of the developmental program to the asymmetric cell-division cycle in C. crescentus, studies of flagellar gene regulation and motility have also begun to reveal basic mechanisms responsible for control of the cell cycle itself. Here, we review recent work on regulation of the flagellar gene hierarchy in C. crescentus and consider regulatory mechanisms that are distinct from those described in Escherichia coli and Salmonella typhimurium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1997.3281691.x
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  • 3
    Electronic Resource
    Electronic Resource
    Ecosystem stability and compensatory effects in the Inner Mongolia grassland (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 431 (2004), S. 181-184 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Numerous studies have suggested that biodiversity reduces variability in ecosystem productivity through compensatory effects; that is, a species increases in its abundance in response to the reduction of another in a fluctuating environment. But this view has been challenged on several grounds. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02850
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  • 4
    Electronic Resource
    Electronic Resource
    A metastable solid solution of Pd-Ni-P formed by containerless drop tube processing (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 5706-5707 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A 20-m drop tube was used to study the solidification of Pd43.5Ni43.5P13 alloy in free fall. The solidified droplets were identified by x-ray diffraction, scanning electron microscopy and x-ray energy dispersive spectrum analysis. The results showed that a near single phase of Pd-Ni-P fcc solid solution was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350192
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  • 5
    Electronic Resource
    Electronic Resource
    Plant communities Ecosystem stability in Inner Mongolia (reply) (2005)
    [s.l.] : Nature Publishing Group
    Nature 435.2005, 7045, E6-, (2 S.) 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Arising from: Bai, Y., Han, X., Wu, J., Chen, Z. & Li, L. 〈weblink url="http://www.nature.com/nature/journal/v431/n7005/full/nature02850.html"〉Nature, 431, 181–184 (2004); see also communication from Guo; Wang et al.Some of our ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03584
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  • 6
    Electronic Resource
    Electronic Resource
    A Conceptual Framework for Selecting and Analyzing Stressor Data to Study Species Richness at Large Spatial Scales (1997)
    Springer
    Environmental management 21 (1997), S. 247 -257 
    Details
    ISSN: 1432-1009
    Keywords: KEY WORDS: Anthropogenic impacts; Biodiversity; Environmental gradients; Geographic information systems; Hierarchy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002679900024
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of changing spatial resolution on the results of landscape pattern analysis using spatial autocorrelation indices (1996)
    Springer
    Landscape ecology 11 (1996), S. 39-49 
    Details
    ISSN: 1572-9761
    Keywords: landscape patterns ; spatial analysis ; spatial autocorrelation ; scale effect ; grain size ; Moran Coefficient ; Geary Ratio ; Cliff-Ord statistic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Understanding the relationship between pattern and scale is a central issue in landscape ecology. Pattern analysis is necessarily a critical step to achieve this understanding. Pattern and scale are inseparable in theory and in reality. Pattern occurs on different scales, and scale affects pattern to be observed. The objective of our study is to investigate how changing scale might affect the results of landscape pattern analysis using three commonly adopted spatial autocorrelation indices,i.e., Moran Coefficient, Geary Ratio, and Cliff-Ord statistic. The data sets used in this study are spatially referenced digital data sets of topography and biomass in 1972 of Peninsular Malaysia. Our results show that all three autocorrelation indices were scale-dependent. In other words, the degree of spatial autocorrelation measured by these indices vary with the spatial scale on which analysis was performed. While all the data sets show a positive spatial autocorrelation across a range of scales, Moran coefficient and Cliff-Ord statistic decrease and Geary Ratio increases with increasing grain size, indicating an overall decline in the degree of spatial autocorrelation with scale. The effect of changing scale varies in their magnitude and rate of change when different types of landscape data are used. We have also explored why this could happen by examining the formulation of the Moran coefficient. The pattern of change in spatial autocorrelation with scale exhibits threshold behavior,i.e., scale effects fade away after certain spatial scales are reached (for elevation). We recommend that multiple methods be used for pattern analysis whenever feasible, and that scale effects must be taken into account in all spatial analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02087112
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  • 8
    Electronic Resource
    Electronic Resource
    The modifiable areal unit problem and implications for landscape ecology (1996)
    Springer
    Landscape ecology 11 (1996), S. 129-140 
    Details
    ISSN: 1572-9761
    Keywords: modifiable areal unit problem ; scale ; aggregation ; zoning systems ; spatial analysis ; spatial autocorrelation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Landscape ecologists often deal with aggregated data and multiscaled spatial phenomena. Recognizing the sensitivity of the results of spatial analyses to the definition of units for which data are collected is critical to characterizing landscapes with minimal bias and avoidance of spurious relationships. We introduce and examine the effect of data aggregation on analysis of landscape structure as exemplified through what has become known, in the statistical and geographical literature, as theModifiable Areal Unit Problem (MAUP). The MAUP applies to two separate, but interrelated, problems with spatial data analysis. The first is the “scale problem”, where the same set of areal data is aggregated into several sets of larger areal units, with each combination leading to different data values and inferences. The second aspect of the MAUP is the “zoning problem”, where a given set of areal units is recombined into zones that are of the same size but located differently, again resulting in variation in data values and, consequently, different conclusions. We conduct a series of spatial autocorrelation analyses based on NDVI (Normalized Difference Vegetation Index) to demonstrate how the MAUP may affect the results of landscape analysis. We conclude with a discussion of the broader-scale implications for the MAUP in landscape ecology and suggest approaches for dealing with this issue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447512
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  • 9
    Electronic Resource
    Electronic Resource
    A system dynamics model of island biogeography (1991)
    Springer
    Bulletin of mathematical biology 53 (1991), S. 911-940 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The MacArthur-Wilson equilibrium theory of island biogeography has been one of the more influential concepts in modern biogeography and ecology. In this paper, we synthesize the theory and examine effects of different immigration/extinction rate-species diversity curves on original predictions from the theory by using the System Dynamics simulation modeling approach. Moreover, we develop a comprehensive and generic System Dynamics model to incorporate a variety of recent modifications and extensions of the theory, including area effect, distance effect, competition effect, habitat diversity effect, target effect, and rescue effect. Through computer simulation with STELLA, a more profound understanding of the theory of island biogeography can be gained. The System Dynamics modeling approach is especially appropriate for such a study because it maximizes the utilization of the ecological data by incorporating qualitative information so that a complex, imprecisely-defined ecological system can be studied quantitatively, effectively, and comprehensively. Our simulation results show that different monotonic rate-species diversity curves do not affect the essence of the theory of island biogeography, while the magnitude of equilibrium species diversity may be greatly affected. Non-monotonic rate-species diversity curves may result in potential multiple equilibria of species diversity. In addition, our model suggests that a non-monotonic relationship may exist between the equilibrium turnover rate and island area and between the equilibrium turnover rate and distance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02461491
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  • 10
    Electronic Resource
    Electronic Resource
    Genetic analysis for protein content in indica rice (1999)
    Springer
    Euphytica 107 (1999), S. 135-140 
    Details
    ISSN: 1573-5060
    Keywords: embryo genetic effect ; genetic covariances ; heritabilities ; 〈 indica rice ; protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Analysis of genetic main effects and GE interaction effects for protein content (PC) and protein index (PI) of indica rice (Oryza sativa L.) was conducted for two year experimental data by using a genetic model for quantitative traits of seeds in cereal crops. Nine cytoplasmic male sterile lines or maintainers as female parents and five restorer lines as male parents were used for a NC II mating design in 1995 and 1996. The results indicated that PC and PI traits were simultaneously controlled by genetic main effects as well as GE interaction effects. For PC and PI of rice, the embryo interaction effects (embryo additive and dominance interaction effects) were important as effects of triploid endosperm, cytoplasm and diploid maternal plant. The estimates of narrow-sense heritability for PC and PI of rice were 85.3% and 77.9%, respectively. The interaction heritability was found to be larger than the general heritability for PC and PI of rice. Significant relationships for components of different genetic effects between PC and PI were found. The GE interaction covariances tended to be positive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026435323139
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